Finding the Fourth Proportional to 8,611.82, 12,917.71 and 2,371.87

Step by Step Solution

1. Step 1: Write the proportion equation
   8,611.82 : 12,917.71 = 2,371.87 : x
2. Step 2: Convert to fraction form
   8,611.82/12,917.71 = 2,371.87/x
3. Step 3: Cross multiply
   8,611.82x = 12,917.71 × 2,371.87
4. Step 4: Simplify right side
   8,611.82x = 30,639,128.82
5. Step 5: Solve for x
   x = 30,639,128.82/8,611.82
6. Step 6: Final answer
   x = 3,557.80